Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
The antimicrobial effect of dermcidin investigated by computational electrophysiology molecular dynamics simulations
Stockholm University, Faculty of Science, Department of Biochemistry and Biophysics.
2013 (English)Independent thesis Advanced level (degree of Master (Two Years)), 40 credits / 60 HE creditsStudent thesis
Abstract [en]

Eukaryotic organisms rely on several mechanisms to inhibit bacterial growth and infection, which mankind has sought to mimic to their specific and more targeted use. Due to the effect of adaptation by bacteria in response to new antibiotics, known as antibiotic resistance, there will be an ever-present need to develop new antibiotics to maintain their high efficiency. Peptide antibiotics appear to target a general property of the bacterial membrane, and should therefore constitute a mechanism which is highly robust to mutational adaptation. We employ a specialized implementation of molecular dynamics simulations to examine the membrane-interactions and -permeabilization caused by human dermcidin in bacterial membranes, which shows antibacterial properties in experiment and forms a transmembrane channel-like structure according to a solved crystal structure. We are able to conclude that charged sidechains maintain a structural rigidity of the oligomeric assembly which in turn enables it to maintain anion selectivity, and that lower oligomeric states constitute an potentially functional oligomeric precursor to the crystallized hexamer. Further we are able to improve channel conductance, and suggest experimental observables to corroborate the given conclusions. The knowledge gained forwards the knowledge-base needed to establish a categorization of the class of AntiMicrobial Peptides, and holds promise for further development as a possible broad-spectrum antibiotic.

Place, publisher, year, edition, pages
2013. , p. 37
Keyword [en]
Molecular dynamics, simulation, ion channel, dermcidin, computation, electrophysiology
National Category
Biochemistry and Molecular Biology
Identifiers
URN: urn:nbn:se:su:diva-138850OAI: oai:DiVA.org:su-138850DiVA, id: diva2:1068999
Supervisors
Available from: 2017-03-02 Created: 2017-02-07 Last updated: 2017-03-02Bibliographically approved

Open Access in DiVA

fulltext(2161 kB)119 downloads
File information
File name FULLTEXT01.pdfFile size 2161 kBChecksum SHA-512
b84873749d1e5246022931ace7ee96e9160d6812896008ce1a707593facadc9e9bfb410fa574d72aff4a32bc7a1036c393c66ef48aa28f0b320ef23b7e754d59
Type fulltextMimetype application/pdf

By organisation
Department of Biochemistry and Biophysics
Biochemistry and Molecular Biology

Search outside of DiVA

GoogleGoogle Scholar
Total: 119 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

urn-nbn

Altmetric score

urn-nbn
Total: 84 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf